Oh yeah, make your own!
It's easy. Start by mixing spices you like, taste with a finger tip. Generally black pepper is a part of it along with paprika, but I've seen other Capsicum (chiles) used, too.
Don't be afraid to try other things, like garlic or onion powder, lemon or orange rind, and other fun things.
And, it doesn't have to be searingly hot.
The general convention is to use mild white fish. But I've used it on salmon and mahi mahi, too.
Have fun!